The dynamics of Web-based social networks: Membership, relationships, and change
applications. However, to do that effectively, it is necessary to understand how networks grow and change. Over a twoyear period we have collected data on every social network we could identify, and we also gathered daily information on thirteen networks over a 47day period. In this article, we present the first comprehensive survey of Webbased social networks, followed by an analysis of membership and relationship dynamics within them. From our analysis of these data, we present several conclusions on how users behave in social networks, and what network features correlate with that behavior.
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